Workshop Technology
Which of the following welding process uses non-consumable electrodes?

Manual arc welding
MIG welding
TIG welding
Submerged arc welding

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Workshop Technology
A jolt machine is used to

Ram the sand harder at the back of the mould and softer on the pattern face
Produce uniform sand hardness throughout the mould
Produce uniform packing of sand in the mould
Ram the sand harder at the pattern face with decreasing hardness towards the back of the mould

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